Keynote speaker Dayle Hayes will talk about "Potatoes, Kids and Schools: Understanding the Science, Calming the Criticism." Her talk will be at 11 a.m. Jan. 25 during the conference, which is Jan. 23-26 at the Three Rivers Convention Center in Kennewick, Wash."One of the really key issues here is that school lunches matter most to those who have the least," she said.Conference board secretary-treasurer Karen Bonaudi said nutrition is topical considering the dispute over limiting the use of potatoes in school lunch programs.